Last year (2022), 36 baby girls were given the name Elina in Poland. As of January this year, there have been 1674 women in Poland named Elina and 32 others who have it as their middle name.
I am Elina and I am from Bulgaria. The name is not common in Bulgaria, but most people really like it. The pronunciation is Elina - the stress is on i. My family and friends call me Ellie.
The standard Polish form of this name is Helena, and it's very popular for babies right now (#21 last year), but Elina was also used here. Last year (2019) Elina was #370 in the girls' ranking as a first name, and 7 baby girls were named this. It was not used as a middle name though. In July 2017, there were 231 women named Elina in the whole Polish population.
This name is also used in Latvia with the spelling Elīna. According to the Population Register of Latvia (PMLP) there are 7980 women in Latvia called Elīna.
https://forebears.io/forenames/elina
https://www.behindthename.com/name/elina/top/russia-moscow
https://ru.m.wiktionary.org/wiki/%D0%AD%D0%BB%D0%B8%D0%BD%D0%B0
Also German:
https://www.beliebte-vornamen.de/18311-elina.htm
https://www.behindthename.com/name/elina/top/germany-berlin
https://www.behindthename.com/name/elina/top/austria
https://de.m.wikipedia.org/wiki/Elina